78245434 has 8 divisors (see below), whose sum is σ = 117630900. Its totient is φ = 39035136.

The previous prime is 78245411. The next prime is 78245443. The reversal of 78245434 is 43454287.

It can be written as a sum of positive squares in 2 ways, for example, as 77528025 + 717409 = 8805^2 + 847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78245434² = 12244695883696712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78245393 and 78245402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42669 + ... + 44464.

Almost surely, 2^78245434 is an apocalyptic number.

78245434 is a deficient number, since it is larger than the sum of its proper divisors (39385466).

78245434 is a wasteful number, since it uses less digits than its factorization.

78245434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87584.

The product of its digits is 107520, while the sum is 37.

The square root of 78245434 is about 8845.6449171330. The cubic root of 78245434 is about 427.7135424147.

The spelling of 78245434 in words is "seventy-eight million, two hundred forty-five thousand, four hundred thirty-four".